The metal structure of the Eiffel Tower weighs 7300 tons while the entire structure including non-metal components weighing 10,000 tons. Depending on temperature, away from the sun spire to 18 cm (7 inches) due to expansion of iron on the part facing the sun. The tower is also swinging 6-7 cm (2-3 inches) in a windy atmosphere.  As a demonstration of the economy of the building, when the 7300 ton steel structure melted, it will meet the 125 square meters with a depth of 6 cm (2:36 inches), which mean density of 7.8 tonnes of iron per cubic meter. The tower has a mass less than the mass of air in the cylinder with the same dimensions,  and 88.3 324 meters radius. Weight tower 10,100 tons when compared with 10,265 tons of air.
First and second levels are accessible by stairs and elevator. A ticket booth at the south tower to sell tickets to the stairs which begin at that location. On the first platform the stairs continue up from the east tower and the third level summit is only accessible by lift. From the first or second platform the stairs open to all people who go up and down depending on if they had bought tickets or tickets elevator stairs. The number of steps 9 to the ticket counter at the bottom, 328 to the first level, 340 to the second level and 18 on the platform elevator at the second level. When out of the elevator on the third level there are 15 stairs up to the upper observation platform. The number of rungs gradually written on the side of the stairs to give an indication of the ascent. Most of the ascent provides a view directly beneath and around the tower although an array of short stairs closed.
Treatment consists of procurement tower 50 to 60 tons of paint every seven years to keep it from rusting. To maintain the appearance of the visitor below, three different colors used on the tower, with a dark color on the bottom and the lighter color on top. Paint color changed; the tower is painted brownish-gray.  At the first level there is an interactive console that tells the color on the next painting. The architect of the Eiffel Tower are Emile Nouguier, Maurice Koechlin and Stephen Sauvestre.